Is it like this?
(both photos taken when it was newish)
I bought this on ebay in March 08 and for the first summer it was really good. Everything grew very well and I was more than pleased.
However, I forgot to take it down for the winter and early this year we had very high winds and all the stitching on the back seam and the zip came undone. Someone on the site very kindly sewed it back together for me, but the zip part couldn't be repaired so I patched it up with some plastic sheeting. This meant that the door could not be fully opened again.
Maybe if you have a very sheltered spot, or if you are organised enough to take it down for the winter, it is a good buy. I think I will be lucky if mine lasts for another season. The frame is excellent, it's just the material that is weak.